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stira [4]
3 years ago
14

What’s the answer ??? Help

Mathematics
2 answers:
DochEvi [55]3 years ago
7 0

Answer:

It's B. (2x+5) (x+4)

blagie [28]3 years ago
6 0

Answer:

b

Step-by-step explanation:

2x²+13x+20

You can just try all the answers if you'd like and see which one equals 2x²+13x+20.

Using FOIL for all of them:

a. (2x-5)(x-4) = 2x²-8x-5x+20 = 2x²-13x+20

b. (2x+5)(x+4) = 2x²+8x+5x+20 = 2x²+13x+20

c. (2x+2)(x+10) = 2x²+20x+2x+20 = 2x²+22x+20

d. is obviously not correct since we already have an answer.

Our answer is b. (2x+5)(x+4)

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What is the rate of growth as a percent for the following function d(x)=23(1.0032)^x
spayn [35]

Answer:

g(x), the % growth rate function, is g(x)=(1.0032^{b-a}-1)*100\ percent

where b and a are x-values of the function d(x), b > a, and a ≠ 0.

Step-by-step explanation:

So,

Since no two values were specified, I will proceed to make a new function, the % growth rate function g(x), based on the one you have given.

We can define g(x) as follows:

g(x)=\frac{d(b)-d(a)}{d(a)}*100\ percent

Where b and a are x-values, b > a, and a ≠ 0.

Substituting the function for values a and b, we get:

g(x)=\frac{23(1.0032)^b-23(1.0032)^a}{23(1.0032)^a}*100\ percent

Simplifying, we get:

g(x)=\frac{1.0032^b-1.0032^a}{1.0032^a}*100\ percent\\ or\\ g(x)=(1.0032^{b-a}-1.0032^{a-a})*100\ percent

g(x)=(1.0032^{b-a}-1)*100\ percent

8 0
3 years ago
What is the value of x in 3^x = 9? Helpp
blsea [12.9K]
X=2
Because:
3^x=3^2
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6 0
4 years ago
How do u do 5k+3k=-8 in combining like terms
PolarNik [594]
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3 0
3 years ago
Using the digits 1 to 9, at most one time each, fill in the blanks to make two different pairs of two-digit numbers that have a
agasfer [191]
Do you mean no repeating numbers within the two sets? Because if so, I don't think it's possible.

I started by trying to figure out what the numbers in the tenths place should be. I used subtraction: 71 - ___ = ____. If you try it out, you can't subtract anything with a 6, 7, 8, or 9 in the tenths place because it will leave you with 11 (a repeating digit number), 10 (has a 0), or less (1-digit numbers). Also, a 3 cannot go into the tenths place because when you do 71 - 3_ , your answer will always begin with a 3 (problem because the 3 repeats), or it will contain a 0. 

Therefore, the numbers left for the tenths place are: 1, 2, 4, and 5. 1 and 5 pair up, leaving 4 and 2.
71 - 5_ = 1_   and 71 - 4_ = 2_.

Then, I tried to figure out what numbers go in the ones place. That lead me to realize they act in pairs. The pairs possible in the ones place are 2 and 9, 3 and 8, 4 and 7, 5 and 6. These numbers always go together to result with the final "1" in the "71". Using this information, I looked at the numbers I already used: 1, 2, 4, and 5. Now, looking at the pairs, I eliminated the pairs containing a number already used. This leaves me with only one pair: 3 and 8. Obviously, you need two more pairs to solve the problem, which leads me to my point of saying: This problem is impossible to solve.

I really hope someone can prove me wrong! But this is the solution I have reached for now. :)
4 0
3 years ago
1 - 4 + 6^2 ÷ ( 1 + 2 × 2 )​
solniwko [45]

Answer:

Step-by-step explanation:

957 6547

4 0
3 years ago
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